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Taxpayers With Extensions
Need to Be Careful

Millions of taxpayers who got four-month extensions earlier this year are racing to wrap up their returns by the next deadline: Aug. 16.

But if you're among the procrastinators, be especially careful. Tricky new tax laws have made it much easier to make costly bloopers this year. For example, more than 3.5 million households already have made mistakes on their 2003 returns in the amounts they claimed for the child tax credit, says an Internal Revenue Service spokesman. Also beware of new rules on how dividends and capital...